I find the sure way to get the correct shops is to first click on the left side of the page where it lists the open opportunities number for everywhere...often 12,000 or so. Then I make sure to put my state abbrev in the first box on the upper right and make sure zip and distance is still listed and then hit update filter. I discovered this years ago when I kept getting jobs in Maui and Saudi Arabia and all over the world. Evidently the zip is not enough to identify which country you are in, you need to add the state two letter code since it is an international company.
I just wish I could hold down the shift bar to look for more than one particular type of shop at once especially those shipping shops where I would like to see all types at once. In my city I often have 12 pages of 50 shops and doing that I could eliminate 10 pages I do not want to see. I know it sounds like a lot of shops but most of them are for one or two clients I do not do and for places not worth the time consuming drive thru slow city streets.